AD 77-25-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sabreliner Corporation | NA-265-70 | Airworthiness Directives; ROCKWELL INTERNATIONAL Model NA-265-70 and NA-265-80 Airplanes |
| aircraft | Sabreliner Corporation | NA-265-80 | Airworthiness Directives; ROCKWELL INTERNATIONAL Model NA-265-70 and NA-265-80 Airplanes |
Unsafe Condition
Deactivation of the engine fire detection system and/or crossed wires in the engine fire detectors to cockpit warning light.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Ensure proper ground between engine fire detector element couplings and engine, verify continuity between elements and fire detector control units per Service Bulletin 30, install new clamps (P/N AN 742-H3), perform continuity checks with a Volt/OHM meter, conduct fire warning system tests using jumper wires and test switches, and ensure proper illumination of fire pull handle lights. Equivalent modifications may be used with FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the next flight after receipt of this telegram, unless already accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sabreliner Corporation Model NA-265-70 (Serial Numbers 370-1 and 370-7) and NA-265-80 (Serial Numbers 380-1 through 380-58).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.